As some of you may have heard last month, Cadmium was found to have contaminated rice in China. There was an interesting article about it in the Bloomberg News:
2013-06-13/china-to-survey- level-of-soil-pollution- nationwide-xinhua-says.html
Human pollution is believed to be the cause. This has understandably caused public outrage and spurred a nationwide project to determine the level of 78 elements in top soil and deeper soil levels. Bloomberg also mentions that according to a Xinhua report, China’s land ministry previously stated that testing had found abnormally high levels of cadmium, mercury, lead and arsenic in parts of the mid-and lower-tributaries of the Yangtze River.